Reamer-relieving machine



` (No Model.) i 3 sheets-sheet 2. F. H. RICHARDS.

EEAMEE vEELIEVING M-AGEINE. No. 336,066. Patented Feb. 9, 1886.

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BEAMER RELIEVING MACHINE.

Patented Feb. 9, 1886.

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FRANCIS H. RICHARDS, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE PRATT 8: VHITNEY COMPANY, OF HARTFORD, CONNECTICUT.

REAMER-RELIEVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 336,066.dated February 9.1886.

Serial No. 154.579. (No model.)

To aZZ whom t may concern:

Be it known that I, FRANoIs H. RICHARDs, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Beamer-Relieving Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to machines for relieving the cutting-edges of reamers, or those of other similar tools, either before or after hard ening, by means of any suitable grinding devices.

r 5 It has for its object to furnish such a machine,

which shall be adapted to relieve the cuttingedges of a tool by reducing each land or surface between the grooves of the same to a shape conforming to a pattern that constitutes 2o a part of said machine.

For the attainment ot' this object, my invention consists in certain combinations of mechanism, which are hereinafter first described in connection with the drawings, and

afterward pointed out in the claims.

Referring to the drawings, Figure 1 is a perspectiveview of a machine embodying my invention. Fig. 2 is a plan view of the same. Fig. 3 is an elevation of' the front side, which 3o is below in Fig. 2. Fig. 4 is atransverse vertical section in line a a, Fig. 3. Fig. 5 is an elevation of the pattern mechanism, as seen from the left hand of Fig. 3. Fig. 6 is a top view of what is shown in Fig. 5. Fig. 7 is a transverse vertical section in line b b, Fig. 3. Fig. 8 is a view similar to Fig. 5, showing a modification in the pattern mechanism. Fig. 9 is a top view of what is shown in Fig. 8. Fig. 6 is in projection to Fig. 5, Fig. 3 to Fig.

4o 2, and Fig. 9 to Fig. 8.

Similar characters designate the same parts in all the figures.

A designates the bed-plate of the machine, having formed thereon ways XV for the carriage C. This carriage is provided with means for sliding it on said ways, which means consists, inthe present instance, of a screw, 2, supported in suitable bearings formed on the bedplate, and working in nut 3, connected to said o carriage. Said screw may be turned by handpower by means ot' a handle applied to head 4; or it may be operated automatically by any of' the devices usually employed for suoli purposes.

H designates the head for carrying the grinding-wheel spindle P. This head is fitted to slide transverely on carriage C, being so moved by means ot' screw 5, as fully shown in Fig. 7. This is a usual device for sliding such parts ol' a machine; but others may be employed, if desired. Spindle P has its bearing, as aforesaid, in head I-I, and carries a grindingwvheel, G, and a drivingpulley, D, each secured thereto in the usual manner.

T designates an adjustable table carrying the reamer-holding fixture and the pattern mechanism, and the device for operating them. This table is pivoted at one end to the bedn plate at 6, and at the other end is clamped in the desired position by screw 7, which passes through slot S and into plate A. Said tableis provided with two uprights, N N, between which the rotary reciprocating frame F is carried on pivot-screws 9. This frame has two upwardlyprojecting parts orarms,1l and 12, between which the oscillating reamer-holding fixture R is pivoted on screws 13 and 14,which are similar to pivot-screws 9. Pivot 13 (see Fig. 2) projects through the arm 15 of fixture R, and terminates in the center 17, for supportingoneendofthereamerE. Theotherend of said reamer is supported by a similar center, 18, fixed in a head, 19, which is adapted to be adj ustably Xed according to the length of the reamer on a way, 20, that is formed on said fixture. The reamer is secured in proper position by means of a stop, 21, xed to block 22, which block is adjustably fixed on a way, 23, formed on the fixture, and by means of' a tension device consisting of block 24, tensionrod 25, and ratchet-wheel 26. The stop and tension-rod just described and the parts immediately associated with them are the same in construction and operation as the similarI parts shown and described in United States Patent No. 308,669, dated December 2, 1884, to which reference may be had.

At the end next to upright M the fixture R is provided with a pin, 27, (it having in this case an arm, 28, for receiving said pim) whereroe by itis oscillated on pivots 13 and 14 by means of a connectingrod, 29, crank 30, shaft 31, and pulley 32, or by some equivalent device. These parts constitute what I call the oscillating mechanism, its function being to oscillate the fixture through the required arc.

In Figs. 1 to 6, K is a cam or pattern, that is adjustably secured by a pivot, 35, and setscrews 36 to one end of the fixture, and arranged to work againstapin or roller, 33, fixed in the higher part of upright M. One or more springs, as 37 or 38, or suitably-connected weights, are employed to hold the cam against pin 33, and thereby govern the position of frame F and the fixture carried by this frame. In Figs. 8 and 9 the positions of cam K and pin 33 are reversed, the cam being in this case secured to the'upright M. It is immaterial to my invention which of these arrangements is used; nor is it necessary that either shall be used unmodified. The shape of the bearingsurface of cam Kdetermines the form of relief given to the reainer-teeth, and hence said shape must be suitably made in each particular case, to produce the required relief, having regard to the size and precise arrangementof the several parts of the machine. The proper methods for making said cam Will be understood by mechanics familiar' with machinery in which forms are reproduced from a model or pattern, so that a particular description of the samer is here unnecessary.

rIhe operation of my improved reamer-relieving machine is as follows: rlhe reainer to be relieved is placed and adjusted in the fixture in the same manner as described in the aforesaid Letters Patent No. 308,669, substantially as shown in the drawings. The oscillating mechanism is adjusted to oscillate the fixture through the required arc, so as to present the wholev width of the rearner-tooth to the action of wheel G, the cam` K being so set as to impart to the fixture a slight movement toward and from said wheel, corresponding to the amount of relief to be given said tooth. The grinding-Wheel and the oscillating mechanism being now put in operation by belts on pulleys D and 32, head His adjusted to bring said wheel against a reamer-tooth, and the carriage C traveled to and fro on ways W until that tooth is properly relieved, these operations being repeated as required.

Having thus described my invention, I claim- 1. The combination of a grinding device, a laterally-movable frame, an oscillating reamerholding fixture carried by said frame, mechn anisrn, substantially as described, for oscillating said xture, and a pattern for controlling the motion of said frame and fixture toward and from said grinding device, substantially as set forth. i

2. The combination of a bed-plate having Ways for a carriage, a carriage adapted to be traveled on said ways, a grinding-Wheel supported on said carriage, a laterally-adjustable table placed at one side of said carriage on said bed-plate, a laterally-movable frame-carried on said table, an oscillating tool-holding fixture carried by said frame, means, substantially as described, for oscillating said fixture, and a pattern for controlling the motion of said frame andfixture toward and from said grinding-wheel, substantially as set forth.

3. The combination of frame F, fixture R, cam K, pin 3.3, and mechanism, substantially as described, for operating said frame and fixture, substantially as set forth.

4. The combination, in arelieving-machine, of a grinding device, a reamerholding fixture, and means, substantially as described, for imparting to said fixture an oscillating Inovement and a movement to and from said grinding device, substantially as set forth.

FRANCIS,- H. RICHARDS- Witnesses:

H. W. FAULKNER, C. O. PALMER, 

